Award Decals Sledgehammer (100 Stickers) The Original Sledgehammer 20mil Heavy Duty Vinyl Award Decals 4 Sheets = 100 Individual Sledgehammer Award Decals per Package Great Incentive for All of your Team Players! Sledgehammer Award Stickers and Reward Decals for all Sports. Award Decals, Inc. is the Original Helmet Decal Company since 1976.